What is the change in oxidation state of carbon in the reaction C6H12O6 → 2C2H5O

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Question: What is the change in oxidation state of carbon in the reaction C6H12O6 → 2C2H5OH? (2023)

Options:

Correct Answer: -1

Exam Year: 2023

Solution:

In the conversion of glucose to ethanol, the oxidation state of carbon decreases, indicating a reduction of -1.

What is the change in oxidation state of carbon in the reaction C6H12O6 → 2C2H5OH? (2023)

What is the change in oxidation state of carbon in the reaction C6H12O6 → 2C2H5OH? (2023)

Step 1: Identify the oxidation states of carbon in the reactant (C6H12O6). In glucose, each carbon has an oxidation state of +1.
Step 2: Identify the oxidation states of carbon in the product (2C2H5OH). In ethanol, each carbon has an oxidation state of -1.
Step 3: Calculate the change in oxidation state for carbon. The change is from +1 in glucose to -1 in ethanol.
Step 4: Determine the difference in oxidation states. The change is -1 (from +1 to 0) and then -1 again (from 0 to -1), totaling a decrease of -2.
Step 5: Since there are 6 carbons in glucose and 4 in ethanol, we focus on the average change per carbon. The average change is -1 per carbon.

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